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  Dimensions | Disc Springs for Heavy Bolt Section | Disc Springs for Flange Applications | Disc Springs Tolerances
DISC SPRINGS TOLERANCES
 
THICKNESS TOLERANCE
Group Disc thickness (t)
mm
Permissible variations
mm
1 0.20 UPTO 0.60
+0.02
-0.06
OVER 0.60 TO BELOW 1.25
+0.03
-0.09
2 FROM 1.25 TO 3.80
+0.04
0.12
OVER 3.8 UPTO 6.00 +0.05
-0.15
3 OVER 6.00 UPTO 14.0
+0.10
LOAD TOLERANCE
Group Disc thickness (t)
mm
Permissible Load Devi.
for load P at appr.75h
1 LESS THAN 1.25
+25%
-7.50%
2 FROM 1.25 TO 3.00
+15%
-7.50%
OVER 3 UPTO 6.00 +10%
-5.0%
3 OVER 6.00 UPTO 14.0
+5.0%
NOTE: Load will vary in stacked springs in proportion to number of springs in stack.
OVERALL HEIGHT TOLERANCE
Group Disc thickness (t)
mm
Permissible Variations
For O.H. MM
1 LESS THAN 1.25
+0.10
-0.05
FROM 1.25 TO 2.00 +0.15
-0.08
2 OVER 2.00 UPTO 3.00
+0.20
-0.10
OVER 3.00 UPTO 6.00 +0.30
-0.15
3 OVER 6.00 UPTO 14.0
+0.30
DISC SPRING HARDNESS RANGE
To ensure good stergth with as little relexation as
possible,the hardness of spring shall lie wthin range of 42 to 52 HRC for Disc springs.
CONVERSION TABLE
inches x 25.40 = millimeters
Millimeters 25.4 = inches
1 Ib = .454 kg
1 kg = 2.2 Ibs.
1 psi = .0007 kg/mm2
1 kg/mm2 = 1422 psi
1 Newton (N) = .225 Ibs. Force
1 Ib. Force = 4.44 N
1 N/mm2 = .102 kg/mm2
1 kg/mm2 = 9.81 N/mm2 = 1422 psi
OD AND ID GUIDE CLEARANCE
O/D OR I/D Size Clearance for O/D OR I/D
MM MM
UP TO 16 0.20
OVER 16 UPTO 20 0.30
OVER 20 UPTO 26 0.40
OVER 26 UPTO 31.5 0.50
OVER 31.50 UPTO 50 0.60
OVER 50 UPTO 80 0.80
OVER 80 UPTO 140 1.00
OVER 140 UPTO 250 1.60
NOTE: Whenever inside guiding are preferred, guide bolts should be harden to 55/60 HRC, also to be ground polished.
OD AND ID TOLERANCE
MM Total Tolerance (MM)
3 UPTO 6 0.12
OVER 10 UPTO 18 0.18
OVER 18 UPTO 30 0.21
OVER 30 UPTO 50 0.25
OVER 50 UPTO 80 0.30
OVER 80 UPTO 120 0.35
OVER 120 UPTO 180 0.40
OVER 180 UPTO 250 1.46
NOTE: Tolarances on OD are shown on minus side,
Tolarances on ID are shown on plus side.
MANUFACTURING COMPROMISE
The manufacturer needs to have option on production
for adjustment of Disc Spring dimension in order to able
to adhereto the required load within allowable
allowances.
SPECIFIED MEASUREMENT ACHIEVED BY ADJUSTMENT OF
A given load and related
height for the stressed
spring
Overall Spring Height
Given load and related
height
Overall Height and
Thickness
The numerical value of the allowable production of the adjustment of Disc Spring dimension must be indicated on the drawing and are considered only for reference purposes.
 
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